Fig. 2From: Effects of vitamin D supplementation in extender on sperm kinematics and apoptosis following the freeze-thaw process in normozoospermic and asthenozoospermic Holstein bullsFlow cytometric evaluation of apoptosis statues of frozen-thawed normozoospermic and asthenozoospermic Holstein bulls’ spermatozoa supplemented with different concentration of vitamin D (A late apoptosis, B necrosis, C early apoptosis and D Live sperm). a,b A,B Different alphabetic letters in each bar indicate a significant difference in normozoospermic and asthenozoospermic bullsBack to article page